System Description

SYSTEM DIAGRAM

Courtesy of NISSAN

INPUT SIGNAL AND OUTPUT SIGNAL CHART

Component	Signal
IPDM E/R	Transmits starter relay control signal to electric shift control module.
BCM	Transmits starter cut relay control signal to starter motor.

SYSTEM DESCRIPTION

"B" terminal is constantly supplied with battery power.
When selector lever is P or N, power is supplied to starter relay by electronic shift control module.
When starter operating condition is satisfied, IPDM E/R turns starter relay ON by starter relay control signal.
When engine cranking condition is satisfied, BCM turns starter cut relay ON by starter cut relay control signal.
Then battery power is supplied to starter motor ("S" terminal) through starter cut relay and starter relay.